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Cryocoolers 8 pp 475-485 | Cite as

Implementation and Test of the Control Algorithms for a Diaphragm Stirling 30 K Cryocooler

  • C. Konkel
  • T. Gibboney
  • K. Ha
  • R. Boyle

Abstract

Delivery to NASA of its first 30K Cryogenic Cooler based on double-acting diaphragms included a control system capable of accommodating both linear and non-linear motors oscillating at a sub-resonant frequency. The Engineering Development Model (EDM) Control System was implemented using Graphical User Interface (GUI) software and commercial data acquisition and control hardware. The unique drive waveform selected to operate each pair of compressor Linear Oscillating Motors (LOMs) and accommodate their inverse square-law transfer function is first discussed. Emphasis is then placed on the controller developed for the expanders and their Moving Magnet Motors (MMMs). The hardware implementation is described, followed by descriptions of the operational software functions and preliminary test results.

Keywords

Drive Signal Virtual Instrument Selectable Duration Preset Range Inverse Transfer Function 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    Konkel, C., Gibboney, T., Van Allen, L. and Ha, K.; “Development and Demonstration of an Electronic Controller for a Double-Acting Diaphragm Cryocooler”, 7th International Cryocooler Conference, November 1992.Google Scholar

Copyright information

© Springer Science+Business Media New York 1995

Authors and Affiliations

  • C. Konkel
    • 1
  • T. Gibboney
    • 1
  • K. Ha
    • 1
  • R. Boyle
    • 2
  1. 1.Fairchild SpaceWashington Technical Support CenterGreenbeltUSA
  2. 2.Cryogenics Technology SectionNASA/Goddard Spaceflight CenterGreenbeltUSA

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